Shemya, AK 1 arc-second MHW DEM

The Shemya DEM integrates bathymetry and topography in the area surrounding and west of Shemya Island, Alaska, at the westernmost end of the Aleutian Islands. It encompasses the neighboring islands of Attu, Agattu, Nizki, and Alaid (the Semichi Islands). The DEM has a 1 arc-second (~30 meter) cell size, and is referenced to a vertical datum of mean high water. It was built in July 2009 to support NOAA's Tsunami Program.

No perspective image available
DEM perspective image. 

Name Shemya
States Alaska
Region Aleutian Islands
172.45 174.21
Date Completed 2009-07-31
Type Coastal Inundation
Horizontal Datum WGS 84
Projection Geographic (degrees)
Vertical Datum MHW (meters)
Vertical Transformation Source elevation data transformed vertically using a constant offset derived from NOAA tide predictions.
Coverage Bathy-topo
Cell Size 1 arc-second
Registration Grid-node
Version 1
Source NOAA / NGDC / MGG
Developer NOAA / NGDC / MGG
Project NOAA Tsunami Inundation
Contact Barry W Eakins @ NOAA / NGDC
Position: not available


DEM Restrictions

WARNING: DEM not to be used for navigation.

How to cite this DEM

Carignan, K.S., L.A. Taylor, B.W. Eakins, R.R. Warnken, E. Lim, P.R. Grothe, and R.J. Caldwell, 2010. Digital Elevation Model of Shemya, Alaska: Procedures, Data Sources and Analysis, NOAA Technical Memorandum NESDIS NGDC-35, U.S. Dept. of Commerce, Boulder, CO, 27 pp.
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